W=   [ 6.247      6.719      1.049      5.729      1.724      4.713      3.557     -2.550      4.051; 
 6.719      8.158      0.143      6.783      4.518      3.556      3.600     -1.115      4.779; 
 1.049      0.143      1.557      1.285     -1.136      2.856      2.225     -1.676     -0.320; 
 5.729      6.783      1.285      8.584      7.538      4.655      7.226      0.183      2.353; 
 1.724      4.518     -1.136      7.538     14.136     -1.129      6.231      6.039     -0.031; 
 4.713      3.556      2.856      4.655     -1.129      6.656      4.953     -3.927      1.612; 
 3.557      3.600      2.225      7.226      6.231      4.953      7.896      0.177     -0.119; 
-2.550     -1.115     -1.676      0.183      6.039     -3.927      0.177      4.622     -1.724; 
 4.051      4.779     -0.320      2.353     -0.031      1.612     -0.119     -1.724      3.750]

  
  a=[-18.727;     -2.128;    -18.699;    -21.955;     -1.012;    -19.482;     44.255;     -0.285;    -22.694]
  

  
  [X, r] = mlambda(W,a,2);
  
  X
  r
  
 Q=[53.4 38.4; 38.4 28.0];
 N=[2.05; 1.30];
 
 [L,d,Z,a]=reduction(Q,N)
 
 L
 d
 Z
 a
 
 
